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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
7449798 Co-generated power supply systemExpiredJul 31, 03Nov 11, 08[H02J]
6236192 AC voltage regulatorExpiredJun 08, 00May 22, 01[G05F]
6067243 AC-AC/DC converterExpiredMar 18, 99May 23, 00[H02M]
6049472 Power factor improving circuitExpiredMar 05, 98Apr 11, 00[H02M]
5856712 Uninterruptible power supply methodExpiredApr 22, 97Jan 05, 99[H02J]
5828563 Single phase input hybrid rectification method employing auxiliary rectificationExpiredOct 26, 95Oct 27, 98[G05F]
5650923 Single phase input-three phase full bridge rectifier circuit and single phase input-pseudo four phase full bridge rectifier circuitExpiredJul 26, 95Jul 22, 97[H02M]

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